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To communicate over a priori unknown channels, pilot sequences can be exploited to assist the receiver in obtaining the channel state information. The analog-to-digital converter (ADC) at the front end of the receiver samples and quantizes the input signal, including both pilot and data symbols. This results in a reduction of the receive signal-to-noise ratio (SNR) as well as deteriorated quality...
Spectrally efficient channel impulse response (CIR) estimation in the sense of minimal training overhead is a key issue for the successful deployment of Filter Bank Multicarrier (FBMC) with Offset Quadrature Amplitude Modulation (OQAM). In this contribution we perform a comparison between channel estimation algorithms considering two different models for the received subcarrier signals: a per-subcarrier...
We propose a novel training-aided feed-forward fre-quency-offset estimation method based on CAZAC sequences. The precision and robustness of the estimator is evaluated with respect to CD and PMD for frequency offsets up to ±3.6 GHz.
Based on maximizing the sum of lower bounds derived for the uplink (UL) and the downlink (DL) rates with imperfect Channel State Information (CSI), overhead optimization i.e. finding the optimum lengths of the UL and DL pilots and feedback bits, is performed. Estimated CSI and quantized Channel Direction Information (CDI), which may be received erroneously, are available at the Base Station (BS) for...
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